Electrical connection



April 13,1926.

8. A. OLSON ELECTRICAL CONNECTIQN Filed Sept. 22. 19 23 2 Sheets-Sheet 1April 13,1926. 1,580,849

B. A. OLSON ELECTRICAL CONNECTION Filed Sept. 22. 1923 2 Sheets-Sheet 2Eff/J1? 0/5014 Patented Apr. 13, 1926.

UNITED STATES BERT A. OLSON, OF MAYWOOD, ILLINOIS.

ELECTRICAL CONNECTION.

Application filed September 22, 1923. Serial No: 664,152.

To all whom it may concern:

Be it known that I, BERT A. OLsoN, a citizen of the United States, anda'resident of Maywood, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Electrical Connections,of which the following is a specification.

This invention relates to novel improvements in electrical connectionsand has for its principal object the provision of an improvedconstruction of this character which will be highly efficient in use andeconomical in manufacture.

In order to make an electric-connection between a lead wire or extensionand the source of supply, the lead wire or extension is usuallyprovidedwith a plug having a threaded sleeve at one end adapted for threadedengagement in a socket and in,

order to attach the plu to thesocket it is necessary to turn the plug anumber of times in a circumferential direction so as to bring about thethreading operation of the sleeve and in turning the plug to bring aboutthis operation the lead wire or extension attached to the plug becomestwisted and curled and the twisting and curling of the lead wire orextension tears the covering of the same and cracks the insulation ofthe wire, in other words, the turning of the plug acts upon the leadwire or extension to shorten the length'of its service. It is one of theobjects of the invention to provide a plug which can be mounted in thesocket to make the electrical connection without turning the plug in acircumferential direction and the construction of said plugis such thata permanent and positive connection is assured. Other objects willappear hereinafter.

The invention consists in the combination and arrangements of partshereinafter described and claimed. I

The invention will be best understood by reference to the accompanyingdrawings forming a part of this specification, and in I which,

plug illustrated in Fig. 1 showing the outer shell, to be hereinafterreferred to, removed therefrom;

Fig. 5 is a sectionalview of the invention taken substantially on line55 of Fig. 3';

Fig. 6 is an end elevational view of the invention; and

Fig. 7 is a perspective view of an element embodied in the invention.

Fig. 8 represents a cross section taken approximately on the line 88 ofFig. 8.

Referring to the drawings showing the preferred form of construction andwith reference, especially to Fig. 2, the socket is indicated at 10 andcomprises a central contact 'pointll to which a conductor, not shown, is

adapted to be fastened. The socket 10 has the usual cavity 12 formedtherein adapted to. snugly accommodate a sleeve 13 having its side wallsprovided with screw threads and to which a conductor wire, not shown,

is adapted to be secured. As best illustrated in Figs. 1 and 3, 14represents, as a whole, a shell having a central passage 16 formedtherein and terminating at its inner end into an enlarged cavity asindicated at 17. EX- tending through the central passage in the shelland adapted, as will presently appear, to have limited longitudinalmovement with respect to the shell is a plug 18, said plug and saidshell being preferably formed of non-conductive material. The plug, 18,which, as will be observed, extends a considerable distance beyond theshell has at its inner end a contact point 19 hearing against aconductor 20 in contact with a connection 21 having an end 21 bent inparallel relation with the conductor and to which a conductor wireindicated at .22 is adapted to be secured. The plug 18 is-supportedthrough the medium of an arm 23 in-,

set in a longitudinal recess-23 for the-pur-,

pose in the plug, said arm having an'elongated. S10t.24c formed thereinthrough which a threaded member 25 is passed and. threadedinto the plugas shown. The arm 23 is.

18 is a shell 29 made with a screw-threaded circumference 30 adapted toco-operate with the screw-threaded sleeve 13 and also made with achannel-shaped portion 30 fitting the recess 23 and adapted to receivethe arm 23. 31 is a tongue which is made with a screw-threaded portion31 adapted freely to move outwardly and inwardly of the channel-shapedportion 30 in order to be engaged with and disengaged from thescrew-threaded sleeve 13, This tongue is mounted upon the inner end of aspring arm 32 slidable upon the arm 22) mounted at its forward end 33upon the screw member 2?. Under this arrangement the arm 23 is slidablewithin the channel-shaped portion 30 and upon the bottom 34 thereof,while the spring arm 32 is slidable limitedly upon said arm 23 and ismade with an inward deformation 35 adapted to co operate with the bevelsurface 27 of said arm 23, whereby when the plug is applied to thesocket 10, the deformation 35 rising on the bevelled surface 27 willforce the tongue in an outward direction and thereby cause both thetongue and the shell 29 to engage the sleeve 13.

When the plug is to be withdrawn the shell is drawn endwise inadirection away from the socket. The arm 23 being attached to the shell,is withdrawn with it; but the spring arm 32 under which the arm 23slides, remains stationary until the spring deformation 35 rides overthe bevelled por tion 27 to allow the disengagement of the tongue 31from the threads of the sleeve 13. The plug can then be readilywithdrawn from the socket without any turning in a circumferentialdirection. To mount the plug in the socket the sleeve bearing end of theplug is inserted into the socket bringing the contact point 19 intocontact with the contact point 11 after which further forward pressureon the plug will cause the shell 14 to move forward bringing the cam orbevelled surface 27 into contact with the defo mation or curved tongue35 raising the portien 31 so that the threads thereof engage theadjacent threads of the sleeve 13 and in this position the plug ispositively secured into the socket without turning the plug in acircumferential direction.

From the description herein and with ref erence to the accompanyingdrawings it will be seen that I provide an electric connection having asa part thereof a plug which can be readily inserted and removed from asocket without damaging the conductor wires carried thereby and it isapparent that the plug can have universal application.

lVhile l have illustrated and described the preferred form ofconstruction for carrying my invention into effect, this is capable ofvariation and modification without de parting from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails of construction set forth, but desire to avail myself of suchvariations and modifications as come within the scope of the appendedclaims.

Having described my invention what 1 claim as new and desire to secureby Letters Patent is:

1. An elect ic connection including a shell member provided with an armhaving a slot therein and a bevelled end, a plug projecting from theshell and having a longitudinal recess therein, a threaded shellsurrounding the plug and having a channelshaped portion fitting saidrecess, said arm projecting into said channel-shaped portion andslidable therein, a screw member fixed to the plug for n'iovablysupporting the same upon said arm and passing through said slot for thepurpose, a spring member slidable upon the arm and fixed to said screwmember for moven'ient with the plug and having a. portion adapted toco-operate with the bevelled end of said arm, and a locking tonguecarried by said spring member, substantially as described.

2. An electric connection including a shell member provided with an arm,a plug having a recess therein receiving said arm, means supporting saidplug on said arm for limited movement in relation to said shell memberand arm, a cam-faced end provided on said arm, a threaded shellsurrounding said plug and channelledto cor respond with the plug recess,a spring member slidable on said arm and co-operative with saidcam-faced end thereon, means connecting the spring member for movementwith said plug, and a threaded locking tongue carried by said springmember, substantially as described.

In testimony whereof I have signed my name to this specification.

BERT A. OLSON.

